Looper-thread pull-off for sewing-machines.



R. G. WOODWABD.

LOOPER THREAD PULL-OFF FOR SEWING MACHINES.

APPLIOATION FILED APR117, 1992. RENEWED MAR. 11, 1908.

909,839. Patented Jan. 12, 1909.

3 SHEETS SHEE'I' 1.

Flame to:

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R. G. WOODWARD. LOOPER THREAD PULL-OFF FOR SEWING MACHINE APPLICATION FILED APR.17, 1902. RENEWED MAR. 11, 1908.

909,839. Patented Jan. 12, 1909 3 SHEETS-SHEET 2.

61:1 mu fez R. G. WOODWARD.

LOOPER THREAD PULL-OFF FOB SEWING MACHINES, APPLICATION FILED 3.17, 1902. RENEWED MAR. 11, 1908.

909,839. Patented Jan. 12, 1909 3 SHEETS-SHEET 3 UNITED STATES PATEZN tllil liifllil.

RU$SEL-G. WOO D WARD, O1" WAUKEGAN, ILLINOIS, ASSIGNOR 'lO UNION SPECIAL Slill'ihii MACHINE COMPANY, OF CHICAGO, ILLINOIS. A OORPOl'tATlON Kil IlJLlNOlH.

LOOPER-THREE PULL-EFF FOR SLENVING-IKACHINESJ Sgaecification of Letters Patent.

Patented Jan. 12, 1963.

Original application filled Febrnesy 18. 19432, Serial No. 95;,599. llivided anal this application filcil April 17, 1902. fleliol No. 103,323. RGXXGWQH Ketch 11, 1&0-5. Serial No. 420,441..

- To all whom it may concem:

' thereon.

This zip lication is a division of m cphcatlon tiled February 18th, 190:2, Ueriai o. 94,599, for IIHPIOVQlllQIllS in overseaming sewing mechanism, and pull oii' devices therefor.

Primarily, the invention includes a novel construction of adjusting devices for the looper thread pull oif, as hereinafter (lescribed and referred to in the appended claims.

In the accompanying drawings, which illus trnte the invention, Figure 1 is a top plan view, partly in section, of so much of the Union Special interlock sewing machine, as is necessary to a complete understanding of my invention; Fig. 2 is 2V detail side elevation, partly in section, of the mech anism for adjusting the looper thread eye lets; Fig. 3 is a. detail of the connection between the eyelets and the adjusting rod; and Fig. i is a. skeletonizecl View, showing the looper operating mechanism. Fig. 5 is an enlarged rear perspective view, illustmt ing the mechanism for swinging the pivoted cast off plate and adjusting the loops: e' elets; Fig. 6 is a. detached view showing 1'. e connection between the adjusting red, the eyelets and the means for holding the eyelet support in place.

The shape of the machine is of the well known Union Special type, and it is not necessary to herein refer to the parts s ,ecifically, except to say that N is the nee l-e; L the looper; and S the spreader or looping hook, the parts being so constructed end operating that the loop thrown out by the needle looo below the work plate is seized by the sprearler or looping hook S, and carried above the work plate to point where the looper L in its oscillatory movement passes into it and carries its own thread into position to be engaged by the needle in its next descent. The loopcr L is attached to an oscillating slm't't M, and has suitably connected with its upper end. so as to oscillate with it an arm cooperating with (bread-- guiding- :u'ms, whe eby the neoille thrcr cl is properly nmnipulatetl, out; it not necessary to refer particularly to these ports.

in general, lhe loopcr llu'ezul pull-oil is similar to that shown in the patent granted to Lansing Qndcrdonk and myself, Novczm her 21th, 1908, Number 837,100, and cone prises the movable fingers or u rms 7, having shonltlersS, extending between eyelets 9 on the frame of the nmchinc. through which eyelets the looperthread guided. in a plane between these fingers or arms is :1 pin 'oted cost-oil plate 11, which at one time or another, according to its position, acts to force the thread oil the shoulders S on the movel'ile finger '3'. The cast oil plate 11. is provided with forked extension ll which a. pin 11 carried by an arm on tho r shifting the needle as shown mul described more fully in my lclcnt #3 31355. 'ginnteti iblovcniber' 27th, 1906.

'As 9. further improvcnunu; in machines oi this (thoracic the pull-oi? for the looper thread is lllflflO zuljustz'ihlc by mljosting the arms P, carrying the eyelets 9. These fill'IlS are former: on a common support as, which -is sdgnstczl back and tort-l1 by the thrczuicil rod 1], i'lil't'l'ilgg' on one Cllfl lhc thiu'ub piece 7c, and screw-lln'ezulcil through a port of the goosonodc of the machine, and at its other end attached to the support for the arms it. llii.s support lite in a. LlEEPTQS- sion on the goose-neck of the nmcliiue, being slotted at 9:, and having the external plate 1 secured to the goose-neck by the screw :2 which passes through the slot, the pl: L having upper and lower lluugcs l0 embrace the upper and lower orlg'cs of the support 2:. By this arrangement. the opm'ulol' only re n late the summit of lo'opor llu'czul i'cqui'. when thickness of goods or lum-s5: of stitch. varies, and this can he ilono wiilioui' stopping the m-ficliinc. by merely lowing llua screw rod U. It will be mulcrsnmd that tlllm feature of the opcrotofs being able to rc ulate the mnounl: oi loopcr llircmi without stopping.tliemnchinc is of great practical importance in :1 machine of this character. For example. very Frequently an operator will he vs a number of (lili'erout liti (is or lots oi goods brought [to hos, of vary H Weight for the looper thread, comprising a plurality of thread guides mounted on an adjustable support, a thread pull-ofl" member engaging the thread between the said eyelets, and a pivoted cast-off plate located in the path of said pull-ofl member and means for adjust- 7 ing said cast-01f plate on its pivot; substan tially as described.

2. In a sewing machine, a pull-ofi device for the looper thread, comprising a pull-off member, a cast-01f, and thread guides 31''. ranged upon opposite sides-of the pull-off member, a support therefor mounted upon the machine frame, and means for adjusting the latter, comprising a rod screwthreaded upon the machine frame and attach'ed'at one end to the thread port; substantially as described.

3; In a sewing machine, a pull olf device for the looper thread including a pull off guide supvmember and thread guides, and means for positively changing the relative arrangement of the thread guides and pull ofl member'operative while the machine is in motion,

"."an d'a cast-ofi' plate.

In a sewing machine, ap ull-oif device for the looper thread compris ng a pull-off 'member, thread guides upon opposite sides thereof, and means operative while the machine is in operation for simultaneously moving the thread guides positively to adjust the same; substantially as described.

5. In a sewing machine, a pull-01f device for the looper thread, comprising a p'ull-ofi' member, a cast-ofl, and thread guides upon opposite sides of the pull-off member, a support for said thread guides and means for adjusting the support and meansfor adjusting the cast ofl; substantially as described. c

6. In a sewing machine, a pull-ofi' device for the looper thread, comprising a pull-01f member, a oast-ofi, and thread guides arranged upon opposite'sides of the pull-ofi' member, said thread guides being mounted on a common support, said support being attached to the goose-neck of the machine, and a plate having upper and lower flanges embracing'the upper and lower edges'of the support, said plate being secured to said support, and a screw-threaded rod for adjusting the support; substantially as described. 7

7. In a sewin machine, a pull-off device, comprising a pu l-oif member, a cast-01f, and thread guldes arranged upon opposite sides of the pull-0H member, a support for the thread guides, said support including a slotted plate attached to the machine frame, with means for holding it in suitable guiding ways, and means for adjusting said support;

substantially as described. v

8. In a sewing machine, a pull-ofi, including stationary eyelets, a movable member reciprocating in a plane between the same and a cast-off plate or cam arranged to cast ofi the thread from said movable member, and means for adjusting the position of the cast-off.

In testimony whereof I affix in presence of two Witnesses.

RUSSEL e.' WOODWARD.

Witnesses:

CHESTER MCNEIL, JULIUs SHIRE.

my signature, 

